/* ====================================================================
   НаВИНЧИК Admin — UI v3.
   Pure black, hairline borders, variable Geist, single lime accent.
   Inspired by Linear / Vercel / Hyperline (2025-26 admin design).
   ==================================================================== */

:root {
  --bg: #0a0a0a;
  --surface-1: #111111;
  --surface-2: #151515;
  --surface-3: #1c1c1c;
  --surface-4: #232323;
  --border: #1f1f1f;
  --border-strong: #2a2a2a;
  --border-focus: #3a3a3a;

  --text: #ededed;
  --text-2: #a0a0a0;
  --text-3: #6c6c6c;
  --text-4: #4a4a4a;

  --accent: #c2ff5f;
  --accent-soft: rgba(194, 255, 95, 0.1);
  --accent-strong: #d0ff7a;
  --accent-ink: #0a0a0a;

  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.1);
  --danger: #f43f5e;
  --danger-soft: rgba(244, 63, 94, 0.12);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.12);
  --info: #818cf8;
  --info-soft: rgba(129, 140, 248, 0.12);

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;

  --sidebar-w: 240px;
  --content-max: 1480px;
}

html[data-theme="light"] {
  --bg: #fafaf9;
  --surface-1: #ffffff;
  --surface-2: #f5f5f4;
  --surface-3: #efeeed;
  --surface-4: #e7e5e4;
  --border: #ebeaea;
  --border-strong: #d6d3d1;
  --border-focus: #a8a29e;
  --text: #0c0a09;
  --text-2: #57534e;
  --text-3: #78716c;
  --text-4: #a8a29e;
  --accent: #16a34a;
  --accent-soft: rgba(22, 163, 74, 0.1);
  --accent-strong: #15803d;
  --accent-ink: #ffffff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Geist', -apple-system, sans-serif;
  font-size: 13px;
  line-height: 1.5;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { min-height: 100vh; }

h1, h2, h3, h4 {
  font-family: 'Geist', sans-serif;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin: 0;
  color: var(--text);
}

a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}

a:hover { color: var(--accent); }

code, pre, .mono, .num {
  font-family: 'Geist Mono', ui-monospace, Menlo, monospace;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'ss01';
}

/* ====================================================================
   Layout shell
   ==================================================================== */

.admin-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--bg);
  border-right: 1px solid var(--border);
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px;
}

.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-ink);
  display: grid;
  place-items: center;
  font-family: 'Geist', sans-serif;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.02em;
}

.brand-title {
  font-family: 'Geist', sans-serif;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.brand-subtitle {
  font-family: 'Geist Mono', monospace;
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 1;
}

.nav-section-title {
  font-family: 'Geist Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  padding: 14px 10px 4px;
  font-weight: 500;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  transition: background 0.12s ease, color 0.12s ease;
  border: none;
}

.nav-link:hover { background: var(--surface-2); color: var(--text); }

.nav-link.active {
  background: var(--surface-2);
  color: var(--text);
}

.nav-link.active::before {
  content: '';
  width: 2px;
  height: 14px;
  background: var(--accent);
  border-radius: 1px;
  margin-left: -10px;
  margin-right: 8px;
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.admin-chip {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 9px;
  font-size: 11.5px;
  color: var(--text-2);
  font-weight: 500;
}

.content-shell { display: flex; flex-direction: column; min-width: 0; }

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 5;
}

.page-title {
  font-family: 'Geist', sans-serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.022em;
  color: var(--text);
  margin: 0;
}

.page-subtitle {
  font-family: 'Geist Mono', monospace;
  font-size: 11.5px;
  color: var(--text-3);
  margin-top: 2px;
  letter-spacing: -0.005em;
}

.top-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
  align-items: center;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text-2);
  font-size: 13px;
  transition: all 0.12s ease;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
}

.content {
  padding: 24px 28px 60px;
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ====================================================================
   Cards, grids
   ==================================================================== */

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.card.stack { display: flex; flex-direction: column; gap: 12px; }

.card-title {
  font-family: 'Geist', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 2px;
}

.card-subtitle {
  color: var(--text-3);
  font-size: 11.5px;
  margin: 0;
}

.grid { display: grid; gap: 12px; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stats-grid  { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

/* ====================================================================
   KPI
   ==================================================================== */

.kpi, .kpi-mini {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.12s ease;
}

.kpi-mini:hover { border-color: var(--border-strong); }

.kpi-label {
  font-family: 'Geist Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  font-weight: 500;
}

.kpi-value {
  font-family: 'Geist', sans-serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.kpi-value.text-warn { color: var(--warning); }
.kpi-value.text-danger { color: var(--danger); }
.kpi-value.text-success { color: var(--success); }

.kpi-note { font-size: 11px; color: var(--text-3); font-family: 'Geist Mono', monospace; }

/* ====================================================================
   Bar chart
   ==================================================================== */

.bar-row {
  display: grid;
  grid-template-columns: 56px 1fr 42px;
  gap: 10px;
  align-items: center;
}

.bar-label {
  font-family: 'Geist Mono', monospace;
  font-size: 11px;
  color: var(--text-3);
}

.bar-track {
  background: var(--surface-3);
  border-radius: 1px;
  height: 6px;
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  background: var(--accent);
  transition: width 0.4s ease;
  min-width: 2px;
}

.bar-fill-green { background: var(--success); }
.bar-fill-info  { background: var(--info); }

.bar-count {
  font-family: 'Geist Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  text-align: right;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ====================================================================
   Buttons
   ==================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  background: var(--accent);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-family: 'Geist', sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s ease, transform 0.08s ease, border-color 0.12s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--accent-ink);
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  background: var(--surface-1);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-muted {
  background: transparent;
  color: var(--text-3);
  border: 1px solid var(--border);
}

.btn-muted:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #e11d48; border-color: #e11d48; color: #fff; }

.btn-success { background: var(--success); border-color: var(--success); color: #0a0a0a; }
.btn-success:hover { background: #5be898; border-color: #5be898; color: #0a0a0a; }

.btn-sm { padding: 4px 9px; font-size: 11.5px; }

.btn-link {
  background: transparent;
  border: none;
  padding: 4px 6px;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.btn-link:hover { color: var(--accent-strong); }

.btn-row { display: flex; gap: 6px; flex-wrap: wrap; }

/* ====================================================================
   Badges & chips
   ==================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 4px;
  font-family: 'Geist Mono', monospace;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
  text-transform: lowercase;
}

.badge-green   { background: var(--success-soft);  color: var(--success);  border-color: transparent; }
.badge-red     { background: var(--danger-soft);   color: var(--danger);   border-color: transparent; }
.badge-yellow  { background: var(--warning-soft);  color: var(--warning);  border-color: transparent; }
.badge-purple  { background: var(--info-soft);     color: var(--info);     border-color: transparent; }
.badge-accent  { background: var(--accent-soft);   color: var(--accent);   border-color: transparent; }

.chips { display: flex; flex-wrap: wrap; gap: 4px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.12s ease;
}

.chip:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }
.chip.active { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ====================================================================
   Tables
   ==================================================================== */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-1);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

thead th {
  text-align: left;
  padding: 9px 14px;
  background: var(--surface-1);
  color: var(--text-3);
  font-family: 'Geist Mono', monospace;
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.1s ease; }
tbody tr:hover td { background: var(--surface-2); }

.link-id {
  font-family: 'Geist Mono', monospace;
  font-size: 11.5px;
  color: var(--text-2);
  font-weight: 500;
}

.link-id:hover { color: var(--accent); }

/* ====================================================================
   Forms
   ==================================================================== */

.form-row, .form-grid { display: grid; gap: 10px; }
.form-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-family: 'Geist Mono', monospace;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
  color: var(--text-3);
}

label.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-family: 'Geist', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-transform: none;
  color: var(--text);
}

input[type="text"], input[type="number"], input[type="password"],
input[type="email"], input[type="datetime-local"], input[type="date"],
select, textarea {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 11px;
  color: var(--text);
  font-family: 'Geist', sans-serif;
  font-size: 13px;
  font-weight: 400;
  transition: border-color 0.12s ease, background 0.12s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--surface-3);
}

textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.5;
  font-family: 'Geist', sans-serif;
}

input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ====================================================================
   Misc
   ==================================================================== */

.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.muted { color: var(--text-3); font-size: 11.5px; }
.text-warn { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }

hr { border: none; border-top: 1px solid var(--border); margin: 4px 0; }

.flash {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12.5px;
  font-weight: 500;
}

.flash-success { background: var(--success-soft); border-color: transparent; color: var(--success); }
.flash-error   { background: var(--danger-soft);  border-color: transparent; color: var(--danger); }
.flash-warning { background: var(--warning-soft); border-color: transparent; color: var(--warning); }

/* ====================================================================
   Modals
   ==================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 60px 20px 20px;
  z-index: 50;
  backdrop-filter: blur(6px);
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 20px;
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-title {
  font-family: 'Geist', sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-3);
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
}

.modal-close:hover { color: var(--text); }

/* ====================================================================
   Responsive
   ==================================================================== */

.mobile-only { display: none; }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9;
  border: none;
}

@media (max-width: 1024px) { .grid-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

@media (max-width: 760px) {
  .admin-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 80%;
    max-width: 280px;
    height: 100vh;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    background: var(--bg);
    border-right: 1px solid var(--border);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  body.nav-open .overlay { display: block; }
  .mobile-only { display: grid; }
  .content { padding: 18px 14px; }
  .topbar { padding: 14px 16px; }
  .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bar-row { grid-template-columns: 48px 1fr 36px; }
}

@media (max-width: 420px) {
  .stats-grid { grid-template-columns: 1fr; }
  .kpi-value { font-size: 22px; }
  .page-title { font-size: 16px; }
}